Taken with a Celestron Omni XLT at about 1639 UT when it was still quite light. I used an infra-red pass filter to get rid of all the daylight and reduce atmospheric shimmer which is mostly in the blue end of the spectrum. I like to take these type of shots at very low luminosity but that makes it difficult to stack and stitch the videos together.
In the end, I had to use Thierry Legault’s manual method (blending via difference mode for alignment in Photoshop). Ive used that twice now with panels that software such as MS ICE cant process and it does work very well.
Celestron Omni XLT 1000/102mm refractor.
Baader 685 nm IR pass filter with Skyris 273m CCD camera.
Ioptron ZEQ25GT mount.
Today’s Sun imaged in Calcium K. the top image shows a nice pair of loop prominences – certainly, the largest loop that I have imaged in CaK.
The middle panel is a mosaic made of 7 separate smaller panels and the bottom image is a single panel showing Active Region 2209.
A little micro-flare (or an Ellerman bomb) was visible at the edge of the penumbra of AR 2216 – red circle (click to enlarge).
Celestron Omni XLT 1000/102mm scope on Ioptron ZEQ25GT mount with astroHutech Hinode guider.
Lunt B1200 CaK module with Baader K-line filter.
Skyris 273m CCD camera with video files processed in AutoStakkert 2/Registax 6.0 and Photoshop CC.
Click to enlarge
A favourite winter target.
Due to cloud, this was only a 25 minute integration (5 x 5 mins) taken at ISO 800 with a Canon 60Da fitted with a Hutech LPS filter. Id hoped to get about 2 hours of data.
480/80mm refractor with x 1.0 field flattener ( a small bristle from a blower brush, accidentally stuck on, caused the diffraction spikes!).
Ioptron ZEQ25GT mount with SSAG/PHD autoguiding.
Backyard EOS camera control and PHD/Backyard EOS dithering.
18 darks and 40 flats (1/20s at ISO 800).
Post-processed in PixInsight and Photoshop.
Ive been at astrophotography for about a year now – my first attempts were with the Pleiades:
Canon 5D mark II and a 70-200mm f4 IS L lens, wide open at f4.
A single 30 second exposure on an alt-az mount.
M45 Pleiades. Some nebulosity can be seen around Merope and some of the other stars (exponential tranform in PixInsight)
Its getting difficult to image the Sun in my back garden. Up here at 55N, the Sun doesn’t get too high in the winter and trees, neighbours’ houses and other obstacles become more of a problem. At the moment, I run out of light at about 1430 UT.
These were taken around 1300 UT with two telescopes. The full disc false colour Sun was taken with a 480/80mm refractor and the medium view and close-up with a 1000/102mm refractor. A TeleVue 2.5xBarlow lens was used for the close-up..
AR2209 is actually monster sunspot AR 2192 back again after traversing the farside.
It seems just as active as it was before with a M3.2 class solar flare today at 1240 UT.
The hazy cloud didn’t clear until late afternoon when the winter Sun was quite low. There then followed the somewhat comical sight of me taking a couple of mosaic panels then moving everything to another part of the garden as the Sun did its best to sink behind trees and neighbours houses.
I had to resite twice and only got 4 panels before I ran out of garden to chase the Sun 🙂
The large AR on the left is AR 2205.
Celestron 1000/102 Omni XLT with Lunt B1200 Ca K module, Baader K line filter and Skyris 274m CCD camera.
Um, THE 2 consecutive sunny days from the UK summer to show rotation of the Sun over 24 hours.
480/80mm refractor with Baader Herschel wedge.